CN102126910B - Butadiene polymerization inhibitor used in separation system of ethylene unit - Google Patents
Butadiene polymerization inhibitor used in separation system of ethylene unit Download PDFInfo
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- CN102126910B CN102126910B CN 201010589382 CN201010589382A CN102126910B CN 102126910 B CN102126910 B CN 102126910B CN 201010589382 CN201010589382 CN 201010589382 CN 201010589382 A CN201010589382 A CN 201010589382A CN 102126910 B CN102126910 B CN 102126910B
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Abstract
The invention relates to the field of chemical additives, in particular to a butadiene polymerization inhibitor used in a separation system of an ethylene unit. The butadiene polymerization inhibitor is prepared from the following raw materials in percent by weight: 2-10 percent of radical capturing agent, 2-15 percent of antioxidant, 2-10 percent of metal passivating agent, 60-92 percent of organic solvent and 2-15 percent of clean dispersing agent. The butadiene polymerization inhibitor is prepared by the steps of: firstly adding 60-92 percent of the organic solvent in a container at normal temperature under normal pressure, sequentially adding 2-10 percent of the radical capturing agent, 2-15 percent of the antioxidant, 2-10 percent of the metal passivating agent and 2-15 percent of the clean dispersing agent under stirring, uniformly stirring and completely dissolving to form a liquid. In the butadiene polymerization inhibitor provided by the invention, besides the efficient radical capturing agent, a synergetic effect is also specially considered with respect to components compatibility, thus, the polymerization inhibition effect is improved and the consumption of the polymerization inhibitor is decreased. The butadiene polymerization inhibitor provided by the invention is applied to a depropanizing column and a reboiler of the ethylene unit, and can effectively prevent butadiene from polymerizing and depositing on the surfaces of the devices.
Description
Technical field
The present invention relates to the auxiliary chemicals fields, specifically relate to a kind of divinyl stopper for separation system of ethylene unit.
Background technology
In ethylene production, the raw materials such as lighter hydrocarbons and petroleum naphtha again through overdraft, alkali cleaning with separate, finally obtain the products such as polymer grade ethylene and propylene through Pintsch process and the resulting splitting gas of chilling.The material of separation system depropanizing tower, it is mainly the hydrocarbon compound of C3 ~ C9, wherein the molar fraction of divinyl is about 20 ~ 40%, divinyl often produces polymerization because of factors such as heat, oxygen and metal ions, thereby causes depropanizing tower and reboiler fouling, and the heat-transfer capability of interchanger in device is descended, increase energy consumption, and make the equipment operation cycle shorten dramatically, and even cause the maintenance of device unplanned shutdown, bring very large hidden danger to safety in production.
Shi Ke institute of China Petrochemical Industry once carried out detailed analysis to the dirty sample of some ethylene unit depropanizing towers and reboiler, and the main component of result proof foulant is polyhutadiene, wherein contains a small amount of hydrocarbon oxide.20 the end of the century whole world generally adopt the divinyl stopper to solve this problem.Three phases has all roughly been experienced in the development of external ethylene unit stopper: (1) uses separately oxidation inhibitor: before 20 century 70s, mainly used and had the compound that suppresses the alkene autohemagglutination, some classical oxidation inhibitor normally, as amine antioxidants such as the phenolic antioxidants such as BHT and dialkyl benzene diamines.(2) multi-functional recombiner: this class stopper has used multi-component formula, is the composite polymerzation inhibitor that contains phenols and amine as HK-18.After the eighties in 20th century, this class stopper has replaced the single dose of in the past using gradually.(3) high-efficiency polymerization inhibitor: this is a kind of novel stopper that recent years abroad is produced, and adopts fully new formula, and component wherein is except possessing efficient feature, and better because of the compatibleness between each component, over-all properties, usage quantity reduces greatly.But the price of imported product is higher.Successively all once there was certain research in domestic petroleum chemical engineering research institute, Beijing University of Chemical Technology, Daqing petrochemical company research institute to the divinyl stopper, but did not all form sizable application.Daqing Petroleum Institute once developed the Butadiene Extraction stopper, synthesized the 4-hydroxyl-2 that divinyl is had good polymerization inhibition performance, 2,6, the 6-tetramethyl piperidine nitrogen oxygen free radical, and add with piperidine NO free radical synergistic retarder is arranged, more suitably add a small amount of detergent-dispersant additive, obtain the stopper formula of polymerization inhibition performance excellence.But it is applied in the Butadiene extraction process process, owing to not considering the factors such as katalysis of metal ion to butadiene polymerization, can not give full play to desirable inhibition.
Summary of the invention
Technical problem to be solved by this invention is to provide the divinyl stopper that is used for separation system of ethylene unit that a kind of reasonable price, polymerization inhibition effect are good, can effectively prevent the separation system of ethylene unit fouling.
In order to address the above problem, the technical scheme that the present invention takes is as follows:
A kind of divinyl stopper for separation system of ethylene unit is made by the raw material of following weight per-cent: free radical scavenger 2% ~ 10%, oxidation inhibitor 2% ~ 15%, metal passivator 2% ~ 10%, organic solvent 60% ~ 92%, detergent-dispersant additive 2% ~ 15%.
At normal temperatures and pressures, the organic solvent of above-mentioned weight percent is first added container, the free radical scavenger, oxidation inhibitor, metal passivator and the detergent-dispersant additive that add successively above-mentioned weight percent under agitation condition, mix and be dissolved into liquid fully, make the divinyl stopper for separation system of ethylene unit.Wherein:
Free radical scavenger is 1,1-phenylbenzene-2-trinitrophenyl-hydrazine or 4-hydroxyl TEMPO;
Oxidation inhibitor is one or both or three kinds in 2,6 di-tert-butyl hydroquinones, N-phenyl-N-secondary-butyl-p-phenylenediamine and N-phenyl-αnaphthylamine;
Metal passivator is N, the inferior bigcatkin willow propylene diamine of N '-two;
Detergent-dispersant additive is one or both or three kinds of polyisobutylene-bis-succinimide, polyisobutene succinimide and PIBA;
Organic solvent is one or both or three kinds of No. 200 solvent oils, oil xylol, kerosene and heavy aromaticss.
Divinyl stopper reasonable recipe for separation system of ethylene unit provided by the invention has following characteristics:
1, it contains free radical scavenger, free radical scavenger can with the Active Radicals Produced reaction that exists in system, generate the compound that does not cause the butadiene polymerization effect, the polyreaction that occurs is not expected in termination rapidly.
2, it contains with free radical scavenger and has synergistic oxidation inhibitor.
3, it contains metal passivator, can with system in metal ion-chelant, make the polyreaction that metal ion can not Butadiene.
4, it contains detergent-dispersant additive, biological before the fouling that can exist in material, comprise the small polymer and the surperficial adsorption film that forms of mechanical impurity that are carried from the upstream by material and form depropanization system, stop small-particle to be gathered into macrobead, it is deposited on the hardware surface.Detergent-dispersant additive can also make foulant soft, easily removes.
The present invention compared with prior art has the following advantages:
Stopper of the present invention is except efficient free radical scavenger component, and also special consideration has synergism and synergy when component compatibility, thereby can improve polymerization inhibition effect, and reduces the consumption of stopper.
Divinyl stopper for separation system of ethylene unit provided by the invention, fully take into account various factors, comprise that metal ion is to the katalysis of butadiene polymerization, be applied in ethylene unit depropanizing tower and reboiler, can prevent effectively that polymerizing butadiene is deposited on these equipment surface.Polymerization inhibition effect of the present invention is better than similar imported product, and the consumption of stopper is 85% of similar imported product, and price is 2/3rds left and right of similar imported product.
The polymerization inhibition effect of stopper of the present invention is measured through accelerating the contamination tests method, and stopper inhibition rate of the present invention is higher than similar import stopper, and polymerization inhibition effect is better.
Embodiment
Embodiment 1At normal temperatures and pressures with 300g oil xylol, 570g200 solvent oil, 30g 4-hydroxyl-2,2,6,6-tetramethyl piperidine nitrogen oxygen free radical, 60g N-phenyl-αnaphthylamine, 20g polyisobutylene-bis-succinimide, 20g N, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 2At normal temperatures and pressures with 750g oil xylol, 50g 4-hydroxyl-2,2,6,6-tetramethyl piperidine nitrogen oxygen free radical, 100g N-phenyl-αnaphthylamine, 60g polyisobutylene-bis-succinimide, 40g N, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 3At normal temperatures and pressures with 760g oil xylol, 40g 4-hydroxyl-2,2,6,6-tetramethyl piperidine nitrogen oxygen free radical, 90g N-phenyl-αnaphthylamine, 80g polyisobutylene-bis-succinimide, 30g N, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 4At normal temperatures and pressures with 250g oil xylol, 630g kerosene, 20g 4-hydroxyl-2,2,6,6-tetramethyl piperidine nitrogen oxygen free radical, 60g N-phenyl-αnaphthylamine, 20g polyisobutylene-bis-succinimide, 20g N, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 5At normal temperatures and pressures with 300g oil xylol, 500g kerosene, 40g 4-hydroxyl-2,2,6,6-tetramethyl piperidine nitrogen oxygen free radical, 80g N-phenyl-αnaphthylamine, 50g polyisobutylene-bis-succinimide, 30g N, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 6At normal temperatures and pressures with 780g heavy aromatics, 40g 4-hydroxyl-2,2,6,6-tetramethyl piperidine nitrogen oxygen free radical, 100g N-phenyl-N-secondary-butyl-p-phenylenediamine, 50g polyisobutene succinimide, 30g N, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 7At normal temperatures and pressures with 300g oil xylol, No. 200 solvent oils of 470g, 30g 4-hydroxyl-2,2,6,6-tetramethyl piperidine nitrogen oxygen free radical, 100g N-phenyl-N-secondary-butyl-p-phenylenediamine, 80g polyisobutene succinimide, 20g N, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 8At normal temperatures and pressures with 400g oil xylol, No. 200 solvent oils of 360g, 40g 4-hydroxyl-2,2,6,6-tetramethyl piperidine nitrogen oxygen free radical, 100g N-phenyl-N-secondary-butyl-p-phenylenediamine, 50g polyisobutene succinimide, 30g PIBA, 20g N, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 9At normal temperatures and pressures with 780g kerosene, 50g 4-hydroxyl-2,2,6,6-tetramethyl piperidine nitrogen oxygen free radical, 60g N-phenyl-αnaphthylamine, 50g polyisobutylene-bis-succinimide, 20g PIBA, 40g N, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 10At normal temperatures and pressures with 740g heavy aromatics, 50g 4-hydroxyl-2,2,6,6-tetramethyl piperidine nitrogen oxygen free radical, 100g N-phenyl-N-secondary-butyl-p-phenylenediamine, 50g polyisobutene succinimide, 30g PIBA, 30g N, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 11At normal temperatures and pressures with 720g heavy aromatics, 60g 1,1-phenylbenzene-2-trinitrophenyl-hydrazine, 100g N-phenyl-αnaphthylamine, 50g polyisobutylene-bis-succinimide, 20g PIBA, 50g N, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 12At normal temperatures and pressures with 650g heavy aromatics, 100g 1,1-phenylbenzene-2-trinitrophenyl-hydrazine, 80g N-phenyl-αnaphthylamine, 50g polyisobutylene-bis-succinimide, 50g PIBA, 70g N, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 13At normal temperatures and pressures with 600g heavy aromatics, 80g1,1-phenylbenzene-2-trinitrophenyl-hydrazine, 90g 2,6 di-tert-butyl hydroquinones, 60g N-phenyl-N-secondary-butyl-p-phenylenediamine, 50g polyisobutylene-bis-succinimide, 20g PIBA, 100g N, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 14At normal temperatures and pressures with No. 200 solvent oils of 450g, 200g oil xylol, 30g hydroxyl 2,2,6,2 of 6-tetramethyl piperidine nitrogen oxygen free radical, 70g, 6 di-tert-butyl hydroquinones, 80g N-phenyl-αnaphthylamine, 50g polyisobutene succinimide, 50g PIBA and 70g N, N '-two inferior bigcatkin willow propylene diamine adds container successively under agitation condition, mix and namely get the divinyl stopper.
Embodiment 15At normal temperatures and pressures with No. 200 solvent oils of 650g, 250g heavy aromatics, 30g 1,1-phenylbenzene-2-trinitrophenyl-hydrazine, 30g N-phenyl-N-secondary-butyl-p-phenylenediamine and 40gN, N '-two inferior bigcatkin willow propylene diamine adds container successively under agitation condition, mix and namely get the divinyl stopper.
Embodiment 16At normal temperatures and pressures with 250g oil xylol, 330g kerosene, 120g heavy aromatics, 80g1,1-phenylbenzene-2-trinitrophenyl-hydrazine, 30g2,6 di-tert-butyl hydroquinones, 60gN-phenyl-N-secondary-butyl-p-phenylenediamine, 50gN-phenyl-αnaphthylamine and 80gN, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Embodiment 17At normal temperatures and pressures with 300g200 solvent oil, 200g oil xylol, 250g heavy aromatics, 70g 4-hydroxyl 2,2,6,6-tetramethyl piperidine nitrogen oxygen free radical, 60g2,6 di-tert-butyl hydroquinones, 60g polyisobutylene-bis-succinimide and 60gN, N '-two inferior bigcatkin willow propylene diamine adds container successively under agitation condition, mix and namely get the divinyl stopper.
Embodiment 18At normal temperatures and pressures with 250g200 solvent oil, 250g kerosene, 310g heavy aromatics, 50g4-hydroxyl 2,2,6,6-tetramethyl piperidine nitrogen oxygen free radical, 30g2,6 di-tert-butyl hydroquinones, 30gN-phenyl-N-secondary-butyl-p-phenylenediamine, 40g PIBA, 40gN, N '-two inferior bigcatkin willow propylene diamine adds container successively under agitation condition, mix and namely get the divinyl stopper.
Embodiment 19At normal temperatures and pressures with 300g200 solvent oil, 400g heavy aromatics, 60g1,1-phenylbenzene-2-trinitrophenyl-hydrazine, 60g2,6 di-tert-butyl hydroquinones, 40gN-phenyl-αnaphthylamine, 50 g polyisobutene succinimides, 40g PIBA and 50gN, the inferior bigcatkin willow propylene diamine of N '-two, add container successively under agitation condition in, mix and namely get the divinyl stopper.
Experimental exampleWith accelerating the contamination tests method, polymerization inhibition effect of the present invention is measured.Pack in the experimental installation of a simulation working condition and contain 39.8% divinyl, 30.6%C
4H
8, 29.6%C
4H
10Raw material, and hanging metal lacing film after 80 ℃ of polymerization 8h, is measured the dirt amount that deposits on lacing film.Add stopper in the evaluation material, amount of scale buildup just has minimizing in various degree, and the degree that amount of scale buildup reduces is called the inhibition rate.The embodiment of the present invention 2 stoppers compare test determination when being all 100mg/kg with similar import stopper add-on, the embodiment of the present invention 2 stopper inhibition rates are 95.2%, similar import stopper is 92.6%, illustrates that stopper polymerization inhibition effect of the present invention is better than similar import stopper.In the same way other the stopper of ten embodiment carried out test determination, the highest inhibition rate of the present invention is 95.6%, and on average the inhibition rate is 93.9%.
Claims (3)
1. divinyl stopper that is used for separation system of ethylene unit, it is characterized in that being made by the raw material of following weight per-cent: free radical scavenger 2% ~ 10%, oxidation inhibitor 2% ~ 15%, metal passivator 2% ~ 10%, organic solvent 60% ~ 92%, detergent-dispersant additive 2% ~ 15%;
At normal temperatures and pressures, the organic solvent of above-mentioned weight percent is first added container, the free radical scavenger, oxidation inhibitor, metal passivator and the detergent-dispersant additive that add successively above-mentioned weight percent under agitation condition, mix and be dissolved into liquid fully, make the divinyl stopper for separation system of ethylene unit;
Described free radical scavenger is 1,1-phenylbenzene-2-trinitrophenyl-hydrazine or 4-hydroxyl TEMPO; Described oxidation inhibitor is one or both or three kinds in 2,6 di-tert-butyl hydroquinones, N-phenyl-N-secondary-butyl-p-phenylenediamine and N-phenyl-αnaphthylamine; Described metal passivator is N, the inferior bigcatkin willow propylene diamine of N '-two.
2. a kind of divinyl stopper for separation system of ethylene unit according to claim 1 is characterized in that described detergent-dispersant additive is one or both or three kinds of polyisobutylene-bis-succinimide, polyisobutene succinimide and PIBA.
3. a kind of divinyl stopper for separation system of ethylene unit according to claim 2 is characterized in that described organic solvent is one or both or three kinds of No. 200 solvent oils, oil xylol, kerosene and heavy aromaticss.
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| CN102408323B (en) * | 2011-08-30 | 2013-08-07 | 北京斯伯乐科技发展有限公司 | Preparation of multifunctional super polymerization inhibitor used in crylic acid refining process and application method thereof |
| CN102766008A (en) * | 2012-07-12 | 2012-11-07 | 天津市瑞德赛恩新材料开发有限公司 | Multifunctional C3 polymerization inhibitor |
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| CN102942438A (en) * | 2012-11-23 | 2013-02-27 | 万达集团股份有限公司 | Polymerization inhibition method for butadiene purifying and refining process |
| CN103073374B (en) * | 2013-01-28 | 2015-05-13 | 宁波金海晨光化学股份有限公司 | Composite polymerization inhibitor for extracting and rectifying conjugated diene with dimethylformamide and use method |
| BR112016029847B1 (en) * | 2014-06-30 | 2022-04-19 | Basf South East Asia Pte. Ltd | Process for the preparation of an aqueous slurry, aqueous slurry, polyisobutylene particles, polyisobutylene composition, shaped article, blends or compounds, use of polyisobutylene particles, reconformed polyisobutylene particles or polyisobutylene compositions isobutylene or shaped articles, and sealants, coatings, adhesives and coverings |
| CN107473926A (en) * | 2016-06-07 | 2017-12-15 | 中国石油化工股份有限公司 | Compositional type polymerization inhibitors for styrene rectification and preparation method thereof |
| CN108409568B (en) * | 2018-04-03 | 2020-09-25 | 上海华谊新材料有限公司 | Process for preparing hydroxyalkyl (meth) acrylates |
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| CN108342221B (en) * | 2018-04-17 | 2020-07-14 | 金浦新材料股份有限公司 | Scale inhibitor for S-Zorb device and preparation method and application thereof |
| CN108707202A (en) * | 2018-06-25 | 2018-10-26 | 碳氢联合科技（北京）有限公司 | A kind of new and effective polymerization inhibitor and its application method for preventing alpha-olefin polymerization |
| CN111087325B (en) * | 2018-10-24 | 2022-12-27 | 中国石油化工股份有限公司 | Polymerization inhibitor, preparation method thereof and application thereof in polyacrylonitrile production |
| CN109232160A (en) * | 2018-10-29 | 2019-01-18 | 江苏常青树新材料科技有限公司 | A kind of compound polymerization inhibitor applied to divinylbenzene distillation system |
| CN114956943A (en) * | 2022-04-25 | 2022-08-30 | 宜兴金兑化工有限公司 | Composite polymerization inhibitor for ethylene device and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445749A (en) * | 2008-10-31 | 2009-06-03 | 浙江杭化科技有限公司 | Scale-resistant clearing agent for quenching oil tower of ethylene unit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4398169B2 (en) * | 2003-03-25 | 2010-01-13 | 伯東株式会社 | Antifouling agent composition and antifouling method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445749A (en) * | 2008-10-31 | 2009-06-03 | 浙江杭化科技有限公司 | Scale-resistant clearing agent for quenching oil tower of ethylene unit |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2004-292472A 2004.10.21 |
| 丁二烯抽提阻聚剂的研制;何玉莲;《中国优秀硕士学位论文全文数据库 工程科技I辑》;20060315(第3期);B016-8，第18-23页 * |
| 何玉莲.丁二烯抽提阻聚剂的研制.《中国优秀硕士学位论文全文数据库 工程科技I辑》.2006,(第3期),B016-8,第18-23页. |
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